|Exam : a two-state thermodynamic analysis program (Volume NIST Technical Note 1401) - Kirchhoff, William H.|
Keywords: Thermodynamic equilibrium--Computer programs
|Three-dimensional supersonic equilibrium flow of a gas around bodies at the angle of attack - Chushkin, P. I.|
Three-dimensional supersonic flow of gas in thermodynamic equilibrium around body at angle of attack
Keywords: ANGLE OF ATTACK; GAS FLOW; SUPERSONIC FLOW; THERMODYNAMIC EQUILIBRIUM; THREE-DIMENSIONAL FLOW; DIMENSIONS; EQUILIBRIUM FLOW; GAS FLOW; SUPERSONIC FLOW; THERMODYNAMIC EQUILIBRIUM; THREE DIMENSIONAL FLOW; TRIGONOMETRY; ANGLE OF ATTACK
|On a case of the application of the limit of the D-subdivision to estimate the quality of a system of automatic regulation - Meierov, M. V|
No Abstract Available
Keywords: COSMOLOGY; QUASARS; STAR FORMATION; STELLAR EVOLUTION; CHAOS; GALACTIC NUCLEI; GRAVITATIONAL WAVES; STELLAR MAGNETIC FIELDS; THERMODYNAMIC EQUILIBRIUM
|Evaluation of Graphite Fiber/Polyimide PMCs from Hot Melt versus Solution Prepreg - Shin, Eugene E.|
Carbon fiber reinforced high temperature polymer matrix composites (PMC) have been extensively investigated as potential weight reduction replacements of various metallic components in next generation high performance propulsion rocket engines. The initial phase involves development of comprehensive composite material-process-structure-design-property in-service performance correlations and database, especially for a high stiffness facesheet of various sandwich structures...
Keywords: AIRCRAFT FUELS; THERMODYNAMIC PROPERTIES; POTENTIAL ENERGY; THERMODYNAMIC EQUILIBRIUM; JET ENGINE FUELS; AIRCRAFT ENGINES; THERMODYNAMICS; ENTHALPY
|Future Photovoltaic Power Generation for Space-Based Power Utilities - Bailey, Sheila|
This paper discusses requirements for large earth orbiting power stations that can serve as central utilities for other orbiting spacecraft, or for beaming power to the earth itself. The current state of the art of space solar cells, and a variety of both evolving thin film cells as well as new technologies that may impact the future choice of space solar cells for high power mission applications are addressed.
Keywords: CONSTITUTIVE EQUATIONS; SPECTRA; DEFORMATION; GLASS; LINEARITY; VISCOELASTICITY; INDUSTRIES; MOLECULAR THEORY; NONLINEARITY; THERMODYNAMIC EQUILIBRIUM
|DECAMETER WAVELENGTH RADIO EMISSION OF JUPITER AS AN INDICATION OF HIGH VELOCITY FLUXES AND SHOCKWAVES IN THE SOLAR WIND - KOVALENKO, V. A.|
THE POSSIBILITY OF DETERMINING THE AVERAGE VELOCITIES OF THE GEOEFFECTIVE FLUXES AND SHOCK WAVES IN THE SOLAR WIND OF JUPITER DURING MINIMUM SOLAR ACTIVITY WAS INVESTIGATED. DATA WERE TAKEN FROM DECAMETER WAVELENGTH RADIO EMISSION.
Keywords: ACOUSTIC EXCITATION; ALKALI METALS; FLAMES; SOUND WAVES; IONIZATION POTENTIALS; POTASSIUM OXIDES; THERMAL PLASMAS; THERMODYNAMIC EQUILIBRIUM
|Measured and Computed Hypersonic Aerodynamic/Aeroheating Characteristics for an Elliptically Blunted Flared Cylinder - Greene, Francis A.|
Computational and experimental hypersonic aerodynamic forces and moments and aeroheating levels for Kistler Aerospace Corporation's baseline orbiter vehicle at incidence are presented. Experimental data were measured in ground-based facilities at the Langley Research Center and predictions were performed using the Langley Aerothermodynamic Upwind Relaxation Algorithm code. The test parameters were incidence (-4 to 24 degrees), freestream Mach number (6 to 10),freestream ratio o specific heats (1...
Keywords: COMPUTER PROGRAMS; SPACECRAFT TEMPERATURE; HEAT TRANSFER; SOLAR RADIATION; THERMODYNAMIC EQUILIBRIUM; ABSORPTIVITY; EMISSIVITY; PLANETARY RADIATION
|Afterbody Heating Characteristics of a Proposed Mars Sample Return Orbiter - Horvath, Thomas J.|
Aeroheating wind-tunnel tests were conducted on a 0.028 scale model of an orbiter concept considered for a possible Mars sample return mission. The primary experimental objectives were to characterize hypersonic near wake closure and determine if shear layer impingement would occur on the proposed orbiter afterbody at incidence angles necessary for a Martian aerocapture maneuver. Global heat transfer mappings, surface streamline patterns, and shock shapes were obtained in the NASA Langley 20-inc...
Keywords: INFRARED SIGNATURES; MASKING; PLASMA RADIATION; SPECTRAL EMISSION; SPECTRUM ANALYSIS; CARBON DIOXIDE; THERMODYNAMIC EQUILIBRIUM; BOW WAVES
|Space shuttle digital flight control system - Minott, G. M.|
The space shuttle digital, fly by wire, flight control system presents an interesting challenge in avionics system design. In residence in each of four redundant general purpose computers at lift off are the guidance, navigation, and control algorithms for the entire flight. The mission is divided into several flight segments: first stage ascent, second stage ascent; abort to launch site, abort once around; on orbit operations, entry, terminal area energy management; and approach and landing...
Keywords: AMMONIA; TABLES (DATA); THERMODYNAMIC EQUILIBRIUM; THERMODYNAMIC PROPERTIES; ATMOSPHERIC MODELS; HIGH TEMPERATURE; SHOCK TUBES; SPACE ENVIRONMENT SIMULATION
|Results of tests of a 0.010- and 0.015-scale models of space shuttle orbiter configurations 3 and 3A in the Ames Research Center 3.5 foot hypersonic wind tunnel (OA23) - Dziubala, T. J.|
Longitudinal and lateral-directional stability and control characteristics were evaluated at Mach numbers of 5.3, 7.3 and 10.3 at angles of attack up to 50 degrees with Beta = 0 degrees and, for a few cases, Beta = 5 degrees. Component force data, fuselage base pressures and shadowgraph patterns were recorded.
Keywords: DEOXYGENATION; METAL IONS; QUINOLINE; THERMODYNAMIC EQUILIBRIUM; ION EXCHANGE RESINS; IONIC REACTIONS; POTENTIAL ENERGY; REDUCTION (CHEMISTRY)
|Investigation of thermodynamic mechanisms for the production of complex compounds essential for the origin of life Final report, 1 Oct. 1965 - 30 Sep. 1966 - Dayhoff, M. O.|
Thermodynamic equilibria in planetary atmospheres and in origin of organic matter - determination of amino acid pairing and sequences in proteins
Keywords: AMINO ACIDS; PLANETARY ATMOSPHERES; PROTEINS; SEQUENCING; THERMODYNAMIC EQUILIBRIUM; THERMODYNAMICS; AMINO ACID; ATMOSPHERIC COMPOSITION; BIOCHEMISTRY; ORGANIC COMPOUND; PLANETARY ATMOSPHERE; ATMOSPHERIC COMPOSITION; PROTEIN; THERMODYNAMIC EQUILIBRIUM; BIOCHEMISTRY; BIOLOGICAL EVOLUTION; COMPLEX COMPOUNDS; JUPITER (PLANET); MATTER (PHYSICS); ORGANIC COMPOUNDS; ORGANIC MATERIALS
|An event recorder for obtaining missile heat-shield ablation data - Russell, J. M., II|
Design, operation and construction of event recorder for monitoring heat ablation data
Keywords: CESIUM PLASMA; ELECTRON DENSITY (CONCENTRATION); ELECTRON ENERGY; FREE ELECTRONS; ATOMS; ELECTRON IMPACT; GROUND STATE; INELASTIC COLLISIONS; THERMODYNAMIC EQUILIBRIUM
|Aerodynamic Characteristics of Bodies at Supersonic Speeds: A Collection of Three Papers - NON|
The three papers collected here are: 'The Effect of Nose Shape on the Drag of Bodies of Revolution at Zero Angle of Attack.', 'Base Pressure on Wings and Bodies with Turbulent Boundary Layers', and 'Flow over Inclined Bodies'. The subject of the first paper is the drag of the nose section of bodies of revolution at zero angle of attack. The main object of the second paper is to summarize the prinicpal results of the many wind tunnel and free flight measurements of base pressure on both bodies of...
Keywords: CRYOGENIC FLUIDS; LEADING EDGES; CAVITATION FLOW; THERMODYNAMIC PROPERTIES; TEMPERATURE EFFECTS; THERMODYNAMIC EQUILIBRIUM; CRITICAL TEMPERATURE; LIQUID HYDROGEN; LIQUID NITROGEN; ENTRAINMENT
|Effect of Hindlimb Unweighting on Single Soleus Fiber Maximal Shortening Velocity and ATPase Activity - McDonald, K. S.|
This study characterizes the time course of change in single soleus muscle fiber size and function elicited by hindlimb un weighting (HU) and analyzes the extent to which varying durations of HU altered maximal velocity of shortening (V(sub o)), myofibrillar adenosinetriphosphatase (ATPase), and relative content of slow and fast myosin in individual soleus fibers. After 1, 2, or 3 weeks of HU, soleus muscle bundles were prepared and stored in skinning solution at -20 C...
Keywords: ATMOSPHERIC MODELS; LUMINESCENCE; ITERATION; BOLOMETERS; CONTINUUMS; ULTRAVIOLET SPECTRA; LINE SPECTRA; LOCAL THERMODYNAMIC EQUILIBRIUM; IUE; LUMINOSITY; SOLAR RADIATION; ABUNDANCE; METALLICITY
|THE KINETICS OF OXIDATION-REDUCTION OF VANADIUM IONS ON VARIOUS ELECTRODES - STEPANENKO, V. G.|
THE EXISTENCE WAS EXAMINED OF INHIBITED PHASES PRECEDING THE ELECTRON TRANSFER PHASE IN THE OXIDATION-REDUCTION OF VANADIUM IONS ON VARIOUS ELECTRODES. THE EXPERIMENTAL CONDITIONS ARE DESCRIBED IN DETAIL.
Keywords: LASER PLASMAS; URANIUM 238; RADIATION SPECTRA; URANIUM PLASMAS; BLACK BODY RADIATION; CARBON ARCS; FISSION PRODUCTS; RUBY LASERS; SPECTROGRAPHS; THERMODYNAMIC EQUILIBRIUM
|Numerical solutions of atmospheric flow over semielliptical simulated hills - Shieh, C. F.|
Atmospheric motion over obstacles on plane surfaces to compute simulated wind fields over terrain features was studied. Semielliptical, two dimensional geometry and numerical simulation of flow over rectangular geometries is also discussed. The partial differential equations for the vorticity, stream function, turbulence kinetic energy, and turbulence length scale were solved by a finite difference technique...
Keywords: CRITICAL POINT; VISCOSITY; EQUATIONS OF STATE; LIQUID-VAPOR INTERFACES; THERMODYNAMICS; TRANSPORT PROPERTIES; APPROXIMATION; COMPRESSIBILITY; THERMAL CONDUCTIVITY; THERMODYNAMIC EQUILIBRIUM
|THE YEARS OF THE SPACE ERA - PONOMAREV, A. N|
THE CONQUEST OF SPACE IS DISCUSSED. THE SOYUZ SPACE VEHICLE, THE ORBITING SPACESHIP SALYUT, AND THE APOLLO SPACECRAFT USED TO LAND A MAN ON THE MOON ARE DESCRIBED ALONG WITH THEIR CONSTRUCTION AND ROCKET MOTORS, AND THE CABIN LIFE SUPPORT SYSTEM.
Keywords: ASTROMETRY; THERMODYNAMIC EQUILIBRIUM; WHITE DWARF STARS; ASTRONOMICAL PHOTOGRAPHY; ASTROPHYSICS; SOLAR PHYSICS; ASTRONOMY; LIGHT BEAMS; LINE SPECTRA; SCINTILLATION; SOUND WAVES
|Predicted Variations in Flow Patterns in a Horizontal CVD Reactor - Kuczmarski, Maria A|
Expressions in terms of common reactor operating parameters were derived for the ratio of the Grashof number to the Reynolds number, Gr/Re, the ratio of the Grashof to the square of 2 the Reynolds number, Gr/Re(exp 2), and the Rayleigh number, Ra. Values for these numbers were computed for an example horizontal CVD reactor and compared to numerical simulations to gauge their effectiveness as predictors of the presence or absence of transverse and longitudinal rolls in the reactor...
Keywords: SOOT; GAS TEMPERATURE; STABILITY; FLAME PROPAGATION; PREMIXED FLAMES; LAMINAR FLOW; METHANE; HYDROCARBONS; OXYGEN; REACTION KINETICS; THERMODYNAMIC EQUILIBRIUM
|Investigation of new radar-data-reduction techniques used to determine drag characteristics of a free-flight vehicle - Woodbury, G. E.|
An investigation was conducted of new techniques used to determine the complete transonic drag characteristics of a series of free-flight drop-test models using principally radar tracking data. The full capabilities of the radar tracking and meteorological measurement systems were utilized. In addition, preflight trajectory design, exact kinematic equations, and visual-analytical filtering procedures were employed...
Keywords: DEOXYGENATION; REDUCTION (CHEMISTRY); GRANULAR MATERIALS; METAL IONS; QUINOLINE; THERMODYNAMIC EQUILIBRIUM; HYDROGENATION; ION EXCHANGE RESINS; OXIDIZERS; REACTION KINETICS
|Summary of research - NON|
Lateral liquid sloshing in axisymmetric tank under low gravity conditions
Keywords: CARBON COMPOUNDS; HYDROGEN COMPOUNDS; OXYGEN COMPOUNDS; PLASMAS (PHYSICS); THERMODYNAMIC EQUILIBRIUM; CHROMATOGRAPHY; INFRARED SPECTRA; ORGANIC COMPOUNDS; TERNARY SYSTEMS
|Catalytic RNA and synthesis of the peptide bond - Usher, D. A.|
We are studying whether the L-19 IVS ribozyme from Tetrahymena thermophila can catalyze the formation of the peptide bond when it is supplied with synthetic aminoacyl oligonucleotides. If this reaction works, it could give us some insight into the mechanism of peptide bond formation and the origin of coded protein synthesis. Two short oligoribonucleotides, CCCCC and a protected form of CCCCU were prepared; the former was made by the controlled hydrolysis of Poly(C), and the later by multistep ch...
Keywords: ACETYLENE; PLASMA WAVES; PLASMAS (PHYSICS); SHOCK WAVES; TITAN; HYDROGEN; METHANE; NITROGEN; SIMULATION; THERMODYNAMIC EQUILIBRIUM; ULTRAVIOLET RADIATION; ELECTRIC SPARKS; ETHANE; HYDROCARBONS; HYDROCYANIC ACID; LIGHTNING; ORGANIC COMPOUNDS; PHOTOLYSIS; PLANETARY ATMOSPHERES
|Thermophysics Characterization of Multiply Ionized Air Plasma Absorption of Laser Radiation - Wang, Ten-See|
The impact of multiple ionization of air plasma on the inverse Bremsstrahlung absorption of laser radiation is investigated for air breathing laser propulsion. Thermochemical properties of multiply ionized air plasma species are computed for temperatures up to 200,000 deg K, using hydrogenic approximation of the electronic partition function; And those for neutral air molecules are also updated for temperatures up to 50,000 deg K, using available literature data...
Keywords: CARBON DIOXIDE; TEMPERATURE RATIO; MIXING RATIOS; RADIANCE; ALGORITHMS; BROADBAND; COMPUTERIZED SIMULATION; THERMOSPHERE; SATELLITE SOUNDING; REMOTE SENSING; RADIOMETERS; ABUNDANCE; THERMODYNAMIC EQUILIBRIUM; EARTH LIMB; KINETIC ENERGY; MESOSPHERE
|Monte Carlo Simulation of the Rapid Crystallization of Bismuth-Doped Silicon - Jackson, Kenneth A.|
In this Letter we report Ising model simulations of the growth of alloys which predict quite different behavior near and far from equilibrium. Our simulations reproduce the phenomenon which has been termed 'solute trapping,' where concentrations of solute, which are far in excess of the equilibrium concentrations, are observed in the crystal after rapid crystallization. This phenomenon plays an important role in many processes which involve first order phase changes which take place under condit...
Keywords: INFRARED SIGNATURES; INFRARED RADIATION; HIGH TEMPERATURE GASES; GAS DYNAMICS; ATMOSPHERIC PRESSURE; MASKING; PLASMA RADIATION; THERMODYNAMIC EQUILIBRIUM; TEMPERATURE DISTRIBUTION; SPECTRUM ANALYSIS; SHOCK WAVES; NASA PROGRAMS; MISSILE SIGNATURES
|Calculation of the thermodynamic properties of alloys of nickel and cobalt - Burylev, B. P|
Calculating thermochemical and thermodynamic properties of nickel and cobalt alloys
Keywords: ACOUSTIC VELOCITY; OXYGEN; PRESSURE EFFECTS; TEMPERATURE EFFECTS; THERMODYNAMIC EQUILIBRIUM; BINARY MIXTURES; CRYOGENIC FLUIDS; LIQUID-GAS MIXTURES; GRAPHS (CHARTS); HELIUM; LIQUID-VAPOR EQUILIBRIUM; MATHEMATICAL MODELS; NITROGEN
|Effect of Random Geometric Uncertainty on the Computational Design of a 3-D Flexible Wing - Gumbert, C. R.|
The effect of geometric uncertainty due to statistically independent, random, normally distributed shape parameters is demonstrated in the computational design of a 3-D flexible wing. A first-order second-moment statistical approximation method is used to propagate the assumed input uncertainty through coupled Euler CFD aerodynamic / finite element structural codes for both analysis and sensitivity analysis...
Keywords: RADIATION ABSORPTION; PLASMA COMPOSITION; GAS IONIZATION; THERMODYNAMIC EQUILIBRIUM; THERMOCHEMICAL PROPERTIES; ABSORPTIVITY; IONIZED GASES; LASER PROPULSION; AIR BREATHING ENGINES; COMPUTATIONAL FLUID DYNAMICS; PLASMAS (PHYSICS)
|Buckling Behavior of Compression-Loaded Quasi-Isotropic Curved Panels with a Circular Cutout - Hilburger, Mark W.|
Results from a numerical and experimental study of the response of compression-loaded quasi-isotropic curved panels with a centrally located circular cutout are presented. The numerical results were obtained by using a geometrically nonlinear finite element analysis code. The effects of cutout size, panel curvature and initial geo- metric imperfections on the overall response of compression-loaded panels are described...
Keywords: SOLAR SYSTEM; SUN; THERMAL RADIATION; ABSORPTIVITY; SPACE TEMPERATURE; EXTRATERRESTRIAL RADIATION; THERMODYNAMIC EQUILIBRIUM; PLANETARY ATMOSPHERES; TELEMETRY; EARTH (PLANET); VENUS (PLANET); PROTON-PROTON REACTIONS
|The first treaty on extraterrestrial space - Lachs, M|
Space flight effects on international relations and formulation of extraterrestrial space treaty
Keywords: ATMOSPHERIC MODELS; THERMODYNAMIC EQUILIBRIUM; MATHEMATICAL MODELS; STELLAR ATMOSPHERES; BALMER SERIES; ELECTRON TRANSITIONS; LYRA CONSTELLATION; PASCHEN SERIES; RADIANT FLUX DENSITY; RADIATIVE HEAT TRANSFER
|Validation of Design and Analysis Techniques of Tailored Composite Structures - Wijayratne, Dulnath D|
Aeroelasticity is the relationship between the elasticity of an aircraft structure and its aerodynamics. This relationship can cause instabilities such as flutter in a wing. Engineers have long studied aeroelasticity to ensure such instabilities do not become a problem within normal operating conditions. In recent decades structural tailoring has been used to take advantage of aeroelasticity. It is possible to tailor an aircraft structure to respond favorably to multiple different flight regimes...
Keywords: SEYFERT GALAXIES; ACTIVE GALACTIC NUCLEI; LINE SPECTRA; ACCRETION DISKS; X RAY ABSORPTION; K LINES; IRON; SPECTRUM ANALYSIS; XMM-NEWTON TELESCOPE; THERMODYNAMIC EQUILIBRIUM; X RAY SOURCES; BROADBAND
|A Review of Diagnostic Techniques for ISHM Applications - Patterson-Hine, Ann|
System diagnosis is an integral part of any Integrated System Health Management application. Diagnostic applications make use of system information from the design phase, such as safety and mission assurance analysis, failure modes and effects analysis, hazards analysis, functional models, fault propagation models, and testability analysis. In modern process control and equipment monitoring systems, topological and analytic , models of the nominal system, derived from design documents, are also ...
Keywords: COMPUTATIONAL FLUID DYNAMICS; NAVIER-STOKES EQUATION; FLOW DISTRIBUTION; AFTERBODIES; CONVECTIVE HEAT TRANSFER; HEATING; HEAT FLUX; THERMODYNAMIC EQUILIBRIUM; THERMOCOUPLES; STAGNATION POINT; SEPARATED FLOW
|Design and Analysis of Transitions From Rectangular Waveguide to Layered Ridge Dielectric Waveguide - Ponchak, George E.|
Transitions from rectangular waveguide to layered ridge dielectric waveguide are studied both experimentally and theoretically. In addition, a design procedure is given for each transition. The analysis and design procedures are valid for transitions between rectangular waveguide and other open dielectric waveguides such as Image Guide, Insulated Image Guide, Dielectric Ridge Guide, and Inverted Strip Dielectric Waveguide...
Keywords: VERTICAL DISTRIBUTION; EQUILIBRIUM EQUATIONS; ATMOSPHERIC CIRCULATION; THERMODYNAMIC EQUILIBRIUM; LIQUID-VAPOR EQUILIBRIUM; HYDROMETEOROLOGY; ATMOSPHERIC SOUNDING; ATMOSPHERIC MODELS; CLIMATE; PARAMETERIZATION; ATMOSPHERIC MOISTURE; WATER; CUMULUS CLOUDS; CONVECTION; ATMOSPHERIC TEMPERATURE; WATER BALANCE
|The 1990/1991 project summaries - NON|
Four projects carried out in 1990-9l at the University of California, Los Angeles, under NASA/USRA sponsorship are summarized. One of the projects described is a mission design, the three others include the design and construction of space-related hardware and testing. Topics researched include: manned voyage to Mars with periodic refueling from electrically propelled tankers; ground speed of balloons on Mars; tripod lunar landing structure; and grappling/docking device accommodating large later...
Keywords: CYLINDRICAL BODIES; BUOYANCY; COOLING; STEADY STATE; STRATIFICATION; THERMODYNAMIC EQUILIBRIUM; TURBULENCE; VAPORS; FLOW VELOCITY; FLUID JETS; JET FLOW; JET MIXING FLOW; LIQUID FLOW; LIQUID HYDROGEN; LIQUID-VAPOR INTERFACES; PRESSURE REDUCTION
|Space law and space resources - Goldman, Nathan C|
Space industrialization is confronting space law with problems that are changing old and shaping new legal principles. The return to the Moon, the next logical step beyond the space station, will establish a permanent human presence there. Science and engineering, manufacturing and mining will involve the astronauts in the settlement of the solar system. These pioneers, from many nations, will need a legal, political, and social framework to structure their lives and interactions...
Keywords: ARC JET ENGINES; EARTH ORBITS; LOCAL THERMODYNAMIC EQUILIBRIUM; NAVIER-STOKES EQUATION; ORBITAL MANEUVERS; PLASMA TEMPERATURE; RADIAL VELOCITY; CENTERBODIES; CONVERGENT-DIVERGENT NOZZLES; MATHEMATICAL MODELS; NOZZLE WALLS; SWIRLING; THROATS; VISCOUS FLOW; VORTICES
|Novel Afferent Terminal Structure in the Crista Ampullaris of the Goldfish, Carassius auratus - Lanford, Pamela J.|
Using transmission electron microscopy, we have identified a new type of afferent terminal structure in the crista ampullaris of the goldfish Carassius auratus. In addition to the bouton-type afferent terminals previously described in the ear of this species, the crista also contained enlarged afferent terminals that enveloped a portion of the basolateral hair cell membrane. The hair cell membrane was evaginated and protruded into the afferent terminal in a glove-and-finger configuration...
Keywords: ISING MODEL; PHASE TRANSFORMATIONS; SOLUTES; TRAPPING; DIFFUSION COEFFICIENT; TWO DIMENSIONAL MODELS; THERMODYNAMIC EQUILIBRIUM; LIQUID PHASES; MONTE CARLO METHOD; CRYSTALLIZATION; CRYSTAL GROWTH; DOPED CRYSTALS; COMPUTERIZED SIMULATION; BISMUTH ALLOYS; SILICON ALLOYS; RANDOM WALK
|Development of a two-equation turbulence model for hypersonic flows - Knight, Doyle D.|
The objective of the current research is the development of an improved k-epsilon two-equation compressible turbulence model for turbulent boundary layer flows experiencing strong viscous-inviscid interactions. The development of an improved model is important in the design of hypersonic vehicles such as the National Aerospace Plane (NASP) and the High Speed Civil Transport (HSCT). Improvements have been made to the low Reynolds number functions in the eddy viscosity and dissipation of solenoida...
Keywords: CAPILLARY FLOW; SURFACE REACTIONS; VAPORS; BIOT NUMBER; COMPUTATIONAL FLUID DYNAMICS; MENISCI; MORPHOLOGY; SUPERHEATING; SURFACE STABILITY; THERMODYNAMIC EQUILIBRIUM; ELASTIC DEFORMATION; EVAPORATION; HEAT TRANSFER; INTERFACIAL TENSION; LIQUID-VAPOR INTERFACES; LIQUIDS; MATHEMATICAL MODELS; POROSITY
|MIT 6.050J / 2.110J Information and Entropy, Spring 2008 - MIT OpenCourseWare|
Instructors: Paul Penfield, Seth Lloyd This course explores the ultimate limits to communication and computation, with an emphasis on the physical nature of information and information processing. Topics include: information and computation, digital signals, codes and compression, applications such as biological representations of information, logic circuits, computer architectures, and algorithmic information, noise, probability, error correction, reversible and irreversible operations, physics...
Keywords: information and entropy; computing; communications; thermodynamics; digital signals and streams; codes; compression; noise; probability; reversible operations; irreversible operations; information in biological systems; channel capacity; maximum-entropy formalism; thermodynamic equilibrium; temperature; second law of thermodynamics quantum computation
|A design and implementation methodology for diagnostic systems - Williams, Linda J. F|
A methodology for design and implementation of diagnostic systems is presented. Also discussed are the advantages of embedding a diagnostic system in a host system environment. The methodology utilizes an architecture for diagnostic system development that is hierarchical and makes use of object-oriented representation techniques. Additionally, qualitative models are used to describe the host system components and their behavior...
Keywords: COMPUTER AIDED DESIGN; RAY TRACING; REACTION KINETICS; THERMODYNAMIC EQUILIBRIUM; TRANSONIC FLOW; HYDROGEN PLASMA; LASER APPLICATIONS; LASER PROPULSION; NAVIER-STOKES EQUATION; PLASMA PROPULSION; FINITE DIFFERENCE THEORY; FORCED CONVECTION; PRESSURE EFFECTS